I had lunch one day this week with Yishai, a fellow from California. He gently chided me for being, on balance, pessimistic about America's non-orthodox Jews. His most interesting comment was that while seen from Israel it may appear they're drifting away, it's also the case that the level of ethnic awareness and commitment among America's Jews is higher than among any other group which has been in America that long (mainstream American Jewry hails mostly from the start of the 20th century, which means they're now into their second century).
The NYT has a story which takes this much further: apparently there's this publicly funded charter school in Brooklyn (Flatbush, no less) which looks like a Jewish school and teaches classes in Hebrew, but is open to anyone and has attracted lots of unlikely kids. America never ceases to surprise.